Skip to main content

About MonkeyGripps

MonkeyGripp - "Hang off with confidence!"

MonkeyGripps are polyurethane foam tank extensions which greatly enhance your ability to grip the tank with your outside leg while hanging off as well as enhance your ability to maintain stability during hard braking. MonkeyGripps will inspire more confidence while using less effort and energy, GUARANTEED

Hanging Off:

The outside leg does all of the work while hanging off the bike in a turn. Traction pads provide a little bit of friction for your outside leg while our products provide substantial support. Single-piece MotoGP style tank extensions add extra surface area for traction pads but they don't add ergonomic support like MonkeyGripps. The difference is in the shape where your leg meets the tank. The curved shape wraps around the top of your outside leg to support your body weight with much less effort. The result is riding with more comfort, more confidence and less effort that you have to experience for yourself to believe!

Hard Braking:

MonkeyGripps' curved "overhang" also provides remarkable support and stability during hard braking. Braking really hard shifts your body weight onto your arms, wrists and hands if you can't grip the tank enough to hold yourself back. Squeezing MonkeyGripps with both of your legs while hard braking you can minimize the forward and upward movement of your body. We are so confident that once you try MonkeyGripps that you won't ever want to ride without them. All MonkeyGripp products come with a money back guarantee (see details below).

 1-piece versus 2-piece

Initially, MonkeyGripps began as a two-piece design. The primary goal of MonkeyGripps was to support riders' outside leg, not provide distance between the rider and the tank. The two-piece design avoided interference with the riders' tuck position and minimized weight. Riders expressed the need to stay back in the saddle and wanted their tank extension to function as a GP-style tank extension as well as provide the confidence enhancing support for their outside leg. We actually prefer the two-piece design because the gap between them encourages riders to develop the habit of keeping their body away from the tank. The one-piece design allows the rider to depend on the product to do the work for them and therefore they do not have to work at developing the habit to stay back in the saddle. The feedback we have received has been an overwhelming preference for a one-piece design so from now on all MonkeyGripps will utilize the one-piece design. The two-piece MonkeyGripps that we still offer function just as well as the one-piece as far as supporting the outside leg. Below is an example of the two-piece design (06-10 GSXR 600 & 750).


2 Construction Material Options: Urethane Coated Polyurethane Foam & Solid Polyurethane Foam

Two versions of MonkeyGripps are available. We offer urethane coated foam and solid foam. The all-foam MonkeyGripps are slightly lower cost and almost half the weight of the urethane coated version. The urethane coated products have a 3 year free-replacement warranty while the all foam products do not. Urethane coated MonkeyGripps are made with an expanding polyurethane foam and coated with a super durable urethane shell. The urethane is painted on one side of the inside of the mold. Then, the mold is closed and the expanding foam is poured in. Since the urethane inside is still wet a chemical bond is created between the two materials. As a result, separation of the foam from the outer shell is virtually impossible. 

The very first MonkeyGripp prototypes were solid foam with no urethane coating. They lasted an entire season of track days and 7 race weekends (6 races per weekend) and didn't show any signs of surface wear, any change in their shape or the foam breaking down at all. The urethane coated Gripps are nearly indestructible. We have never seen nor had any reports of separation between the inner foam and outer urethane shell, the foam breaking down or any other signs of structural degradation. 

The urethane coated foam MonkeyGripps have a slightly more refined and consistently colored surface texture and appearance. However, it's nearly impossible to detect a difference from a few feet away.



Initially, MonkeyGripps were coated with the urethane on both the front and the back. We have since changed our manufacturing process and only coat the front with urethane. There are 3 reasons for this change. 1) Foam creates a stronger bond with the VHB tape and the Permatex RTV. 2) Using less urethane decreases the weight. Despite using less urethane overall we are making the urethane coating thicker on the front where wear resistance is needed3) The seam between the mold halves is much less visible thereby creating a better looking final product.  

MonkeyGripps Have a Textured Back

Initially, MonkeyGripps were smooth on the front and the back. We discovered, by accident, that micro scratches in the master patterns used to create the silicone molds improved the bond of the VHB tape and the Permatex RTV. Now we sand the back of the master patterns with 60 grit sandpaper to create a texture that is perfect for strengthening the adhesives' bond.


Permanent & Semi-Permanent Adhesive Options

MonkeyGripps come with 3M VHB LSE (Very High Bond/
Low Surface Energy) transfer tape on the back. The acrylic based tape is remarkably strong, but we recommend it ONLY for testing purposes. It is strong enough to hold the MonkeyGripps in place while you sit on paddock stands and do some on street or track testing to see if they are going to work for you. However, in order to assure that they stay in place long term, we recommend they be installed with a permanent adhesive. After testing dozens of different types and brands of heavy-duty adhesives, we found three that work very well on both the fuel tank and the urethane coated MonkeyGripps. The Permatex Ultra Synthetic is our favorite and a large 3.5 once tube is included with every purchase.

1) Gorilla Ultimate Construction Adhesive
2) Gorilla Glue (Original, not the Clear)
3) Permatex Ultra Synthetic RTV (1 large tube and several finger cots are included with every MonkeyGripp purchase) 

Adding Tractions Pads to MonkeyGripps

You will need to remove your traction pads from your tank before installing MonkeyGripps. Although traction pads are not necessary some riders have reinstalled their traction pads over their MonkeyGripps. We offer a Traction Pad Installation Kit that includes (four) 6"x 12" sheets of VHB tape, a 20ml bottle of 3M Primer 94 and a disposable glove. A quick wipe of the surface of your MonkeyGripp with the Primer 94 on a rag or paper towel will make the adhesive much more effective. We use it on the back of all MonkeyGripps before installing the VHB tape.

Color Options

We mix our own colors so virtually any solid color or two-tone swirl color combination is possible. Please include a note in your order if you choose the two-tone option. The two-tone colors in the color pallet are just examples of what is possible. You can pick any two colors to mix. Custom colors and color matching are also available. Email us a photo of any color you want and we will do our best to match it.


Trapped OEM Seat Modification

Some sport bikes' OEM seats need a minor modification to be able to remove them with a MonkeyGripp installed on the tank. If the seat can only be removed by lifting them up from the front closest to the tank the MonkeyGripp gets in the way and the seat becomes trapped in place. Two L-shaped brackets keep the seat from sliding backwards and causes the seat to be trapped in place with a MonkeyGripp installed on the tank. In order for the seat to be removed with a MonkeyGripp it needs to be removed from the back first. This is achieved by shortening the two L-shaped brackets on the underside of the seat. This allows the seat to be unbolted and then slid forward enough for the seat to be removed by lifting the back upwards. Remove length from the L-shaped brackets a little bit at a time so that you don't take off more than is necessary.


MonkeyGripps are intended primarily for track use with racing bodywork.  Superbike seats with a thin cushion of rubber or foam are ideal for racing because they increase the rider's sensitivity to small movements of the bike's chassis, suspension and tires. The thick padding of an OEM seat prevents the rider from feeling crucial micro-movements that help a rider judge edge grip, tire spin and other subtle aspects of the feedback these sensations offer. Racing seats are unbolted and lifted without needing to lift them from the front first thereby avoiding the trapped seat problem. If you are riding on the track with an OEM seat you (and your lap times) will not regret making the switch to a superbike seat. 
Superbike Seat Modification
If your seat pan profile sits higher than the OEM seat modification might be needed in order for the MonkeyGripp to fit on the tank in the correct location. We have only seen this problem with the 17-20 R6 but it might occur for models considering the growing number of bodywork manufacturers. MonkeyGripps match the shape of each bike's tank so they are not adjustable. They will only fit correctly in one location on the tank. Since fiberglass bodywork is so thin, one solution is to add fiberglass on the inside of the pan and then sculpt the shape to accommodate the MonkeyGripp with a dremel or angle grinder. Then, hand sanding a thin layer of body filler such as Bondo will allow you to create a perfectly smooth surface to paint.  Another solution, depending on your fiberglass patching skills, is to cut the seat pan, surface patch the hole and then finish with body filler.


Money Back Guarantee

Mount your MonkeyGripps on your bike with the VHB tape and ride with them. If you don't like them for any reason send them back for a refund. We do not refund the shipping cost to you ($8 to $15) and you are responsible for the cost of shipping them back to us. Installation with the included Permatex Ultra Synthetic RTV (or any permanent adhesive) voids this money back guarantee.


MonkeyGripps are made by hand one pair at a time. When it comes time to mass produce them, we are committed to using a domestic company rather than one in Asia. We are committed to MADE IN THE USA even if that means lower profit margins.

Patent Information

A provisional patent was filed 3/3/2020. The non-provisional patent was filed and submitted for review 11/10/2020.

See It In Action!


MonkeyGripp Research & Development

MonkeyGripps were born at the racetrack. As a short rider with a long torso and short legs, it became difficult to hold on to the tank with my outside leg the more I tried to hang off the bike. Most people have seen the YouTube video of the unfortunate track rider who falls off his bike mid corner while his bike continues down the track without him. He then proceeds to give chase on foot and jumps back on the still upright ghost cycle. Well, that could have easily been me before experimenting with ways to extend the tank for my knee to reach while fully hanging off. My first prototypes were crude, hand sculpted chunks of foam. The shape evolved over time by hacking away at the foam with a razor blade to make them more effective at providing support in the right places while still being comfortable and not intrusive while riding.

While shaping one of the first foam versions on a belt sander, I cut off my middle finger down to the first knuckle in the machine's drive pulley. After surgery and a bit of healing, I resumed work on MonkeyGripps. The two biggest challenges were finding a way to match the shape of the tank and creating a perfect mirror image of the sculpted model from one side. A two-part, self-hardening epoxy putty was the solution to capturing the tank shape. As for creating the mirror image, an affordable 3D scanner and 3D printer helped get the job done without breaking the bank.